Portal de Periódicos da CAPES

Dihydrogen complexes as prototypes for the coordination chemistry of saturated molecules

2007; National Academy of Sciences; Volume: 104; Issue: 17 Linguagem: Inglês

10.1073/pnas.0609707104

1091-6490

Gregory J. Kubas,

Metalloenzymes and iron-sulfur proteins

The binding of a dihydrogen molecule (H 2 ) to a transition metal center in an organometallic complex was a major discovery because it changed the way chemists think about the reactivity of molecules with chemically “inert” strong bonds such as H H and C H. Before the seminal finding of side-on bonded H 2 in W(CO) 3 (PR 3 ) 2 (H 2 ), it was generally believed that H 2 could not bind to another atom in stable fashion and would split into two separate H atoms to form a metal dihydride before undergoing chemical reaction. Metal-bound saturated molecules such as H 2 , silanes, and alkanes (σ-complexes) have a chemistry of their own, with surprisingly varied structures, bonding, and dynamics. H 2 complexes are of increased relevance for H 2 production and storage in the hydrogen economy of the future.